Thermoinsulated stopper or cover for thermos bottles and the like



Jan. 2, 1951 G. P. DE oLlvElRA THERMOINSULATED sToPPER 0R covER FORTHERMos BOTTLES AND THE LIKE Filed May 18, 1949 WSL.

INVENTOR @Gems/0 P//vro af Oum/,QA

BY W JWM im ATTORN EYS Patented Jan. 2, 1951 THERMoiNsULA'rED s'roPPERon COVER EGB THERMOS lO'l-TLES AND; THE LIKE Gervasio Pinto de liveira,Riov d e Janeiro,V Brazil Application, Marl. 1949, Serie! ,Na 93,918

; I lrezilMrh 1,1,.4, 1949 Claims The present invention relatestoimprovements Y Iin thermo-insulating, stopper or cover made ofnon-absorbent material and tting into the space between the bottomv ofthecup which tops the i. thermos or vacuum bottle and themouth of thelatter bottle, whereby the stopper is secured in its closing position bythe pressure exerted upon it by the bottom of the said cup when thelatter is screwed on or otherwise fixed to, the, mantle or envelope ofthe bottle.

`ift is the principal object of this `invention to substitute by thestopper or cover herein described and claimed the Stoppers or plugs ofcork and like materialsas are commonly `used in` connection with thermoso r vacuum bottles orthe like and which are apt tobecome easilyimpregnated with the various liouid foodstuffs successively lled intosuch bottles, thus `causing a serious inconvenience both as regards thetaste and the proper preservation of such foodstuffs.

One advantage of the stopperor cover according to the present inventionconsistsinrthat it permits a perfect and hygeinic closure `of the vacuumbottle or the like.

Another advantage is thatthe stopper` or cover is, by itself,thermo-insul9 ting.

A further advantage of the .stopper or cover consists in thatit is soconstructed that it can be made of noneabsorbent material and stillful.- fils its purpose of a perfect closure of the bottle. -Anadditional advantage due toits particular construction is that thestopper or cover can be made of materials not subiectto the changes ordeterioration by which cork" Stoppers are commonlvafected. I s

Still anotheradvantage of the stopperor cover of thisinvention is itsadiustahility on being ritted within the space between the bottom of thecup or other top closure on vacuum bottles or the like, and the mouth oftbe bottle, by whichadjustment the bottom of the cup or top,` closurewill always firmly press the stopper or cover into the mouth of thebottle and maintain it in such position.` thus providing a-tighter andsafer closing of the bottle.

vFinally the particular construction of the stopperor cover of thisinvention--hasgthe advantage 'of its being easily mounted `anddismounted, cleaned and sterilized.

The invention will now he described in detail by way of example, withreference to the accompanying drawings in which Figure 1 illustrates inlongitudinal section and separated from each other the two parts ofwhich Vthe ystopper is composed;

Figure 2 shows, also in longitudinal section, the same stopper properlyassembled and iitted into the mouth of a vacuum bottle with an invertedCupxed 011th@ bottle topping the Whole:

Figure 3 shows the same arrangement of Fig. 2, the stopper beingadjusted to adapt itself to the greater distance from the bottom of thetopping cup to the mouth of a different bottle rand cup.

As `can be seen in the drawingsthe invention essentially consists of anexternal part I of the stopper -(Fig. 1) adapted tov close the bottlewhich part is formed by an elongated cylindrical hollow body closed .atone end 2 and fitting into the mouth of the bottle in the manner of acork ork stoppen. the opposite end being open and provided with asalientedge forming a ange 3 the undersurface 4 of which adapts itselfto the mouth of the vacuum bottle. The inside of this hollow body fromthe open end downward short of the closed end is provided with a screwthread 5A engageable by the vcorresponding screw thread Ill ofV theother internal and adjustable part 8 of the stopper. `The said externalhollow bodyi-s furthenprovided on its outside adjacent the. flange 3with a shoulder or recess 6 which receives a suit,- able sealing means`consisting of a-cylindrical hollow-,body with a projecting upper flangeI comingbetween `the ange of the stopper and the mouth of the bottle,the part 'Ia of thefsaid sealing means being tted under pressure intothe recess 6.

The-internal adiustablepart 8, already mentioned. of thestopper'according to the invention ('Fig 1) is also formed byanelongated` cylindrical hollow body the closed end 9 of which isbulkier than the rest of the hollow body,r and contactsthe bottom of theinverted cup topping the bottle The external surface of the hollow body8` from the closed end portion 9 downward is providedwwith-a screwthread it ,whereby its open end rportionengages. the screw thread insidethe open `endportion of the externalhollow -body I. Thus, these twobodies I and 8, on being assembled, Vform astopper whichcanbe adius'tedaslto its length by screwing them together in a .higher or lower degree.The body isprovided withV a xing ring I I engaging the screw I Il, andthus permittingrthe stopper to be set and held at a desired height. Due`to the assembly of the hollow bodies in the manner described, an airchamber a (Figs. 2 and 3) is formed which makes the stopperthermo-insulating.

Fig. 2 of the drawing shows the stopper assembled and fitted into themouth of the vacuum bottle, adapting itself exactly in the space betweenthe mouth I4 of the bottle and the bottom of inverted cup I2 mounted onthe bottle. Thus, by placing the cup I2 over the stopper, the latter iskept in position due to the pressure exerted upon it by the bottom ofthe cup screwed or otherwise secured to the mantle or protectingenvelope I3 of the vacuum bottle and, in consequence, the stopper willengage the mouth of the bottle by means of the sealing iiange 1 and ringla. The thermo-insulating air chamber formed within the hollow stopperin indicated by reference letter a.

Figure 3 shows the same stopper described with reference to Fig. 2adapted to a diierent vacuum bottle where it is adjusted to the largerspace existing between the cup bottom VI2 and the bottle mouth I4. Fromthe adjustment results a free space I5 which may be filled, if desired,by one or more washers of suitable material, there also being formed inthis case, the thermo-insulating air chamber a.

I claim:

1. An insulating stopper for thermos bottles Y and the like comprisingupper and lower relatively bers for locking them against relativemovement,

each member having a hollow tubular body open at one end, the lowermember being open at its upper end and being flanged at said end to seaton the mouth of the bottle when said member is inserted into saidbottle; the upper member being open at its lower end and capped at itsupper end, said tubular bodies having cooperating threaded portions.said portions being screwed telescopically one into the other, saidlocking means locking said bodies in any predetermined lengthwiserelation with respect to one another whereby said cap may be spaced anypredetermined distance from the mouth of the bottle.

2. An insulating stopper according to claim 1, in which the open ends ofthe tubular bodies face in opposite Vdirections and form an insulatingchamber of variable length when screwed together. Y

3. An insulating stopper according to claim 1, in which said lockingmeans comprises a nut movable'on the screw of one of said bodies tofrictionally engage the other body to lock said parts against relativemovement.

4. A closure for vacuum bottles and the like of the Vtype having innerand outerV containers, the outer container having a cup closure, theinner container comprising a bottle having a stopper positioned belowsaid cup, said stopper comprising upper and lower relatively movablemembers, and meansV between said members for locking them againstrelative movement, the lower member having a body extending into thebottle and being flanged at its upper end to seat on the mouth of saidbottle; the upper member extending into said lower member and having acap at its upper end, said members having cooperating threaded portions,said portions being screwed telescopically one into the other, said capbeing longitudinally adjustable with respect to the lower member so asto raise said cap into contact with said cup closure; said locking meansbeing adaptedto lock said upper and lower members in such adjustedposition, whereby said cup closure will bear against the cap of thestopper and lock it against displacement with respect to the bottle whenthe cup closure is fixed to the outer container. Y Y

5. An adjustable thermo-insulating stopper assembly of rigidnon-absorbent material suitable for use in closing the mouths of thermosbottles and similar receptacles, which comprises: two independentcooperating elements; one of said independent elements constituting thestopper element proper, and the other of said independent elementsconstituting an adjustable element capable of being seated in saidstopper element in Vsuch manner as to regulate the overall length ofsaid stopper assembly; said stopper element proper comprising: a hollowelongated body closed atone end and open at the other, a flange adapt-led to be seated on the mouth of the thermos bottle to be closed, saidilange surrounding the outside periphery Vof said hollow elongatedV bodyat the open end thereof and secured thereto, a sealing element forholding said Viiange on said hollow elongated body portion, said sealingelement being positioned below said flange and surrounding said body, ahelical screw-thread formed on the interior or said hollow elongatedbody and extending from adjacent said open end thereof to a pointVadjacent said closedrend of said hollow body; and said independentcooperating adjustable element comprising a hollow Vtubular body open atone end and closed at the other, said tubular body being of such size asto permit its insertion within said hollow portion of said stopperelement proper, said hollow tubular body being provided with a shapedhead portion at the closed end thereof, a helical Screw-thread formed onthe outside shank of said hollow tubular body, said screw-thread beingadapted to engage said helical screw-thread on the interior Vof saidstopper ele- Y ment proper, and a washer screw-threadedly jengaged onsaid screw-thread on said shank, said washer being adapted, when saidadjustable element is positioned within the hollow portion of siredposition along said shank to provide a stopper assembly of any desiredoverall length;

GERVASIO PINTO DE OLIVEIRA.

REFERENCES CITED The following references are of record in the le ofthis patent:

UNITED STATES PATENTS V Number Name Y YDate '1,918,301 Y Webber 1 July18, 1933 1,918,308 Webber 11" July 18, 1933 '12,106,122 McGowan Jan. 18,19,38

p2,176,012 Payson et al. Oct. 10, 1939 l2 .`364,126 Cantor et al. Dec.5, 1944

